
For Charles' formal investiture as Prince of Wales and Earl of Chester in 1969, the British monarchy wore a sunny pale-yellow hat that perfectly matched her outfit. The hat's design was nothing like the Queen had previously worn.

For a formal occasion in Malta in 1967, the Queen wore this swim-cap-inspired floral hat to match her floral printed coat.

In 1980, the monarch changed her look a tad bit and opted for a green tam o'shanter. This particular hat reflects Queen's Scottish roots.

While visiting the Isle of Man in 1989, the Queen sported a pastel blue hat that featured a paisley design at the top. This is one of her favourite hats of all time.

In 1993, Her Majesty wore a fifties-themed colourful polka dot hat that matched her green coast.

In 1998, the Queen visited Malaysia and during one of her appearances, she wore this blue-grey hat which featured twirling grey and cream-coloured ribbons right along the rim.

In 2010, Her Majesty hosted a garden party at Buckingham Palace. For the occasion, she wore this lilac and blue hat that featured several feathers.

This year at Queen's Platinum Jubilee, which celebrated her 70 years in service, the monarch donned a green hat to match her green ensemble. To accessorize, she wore pearl necklaces.